Speedify Combines Starlink and 4G/5G Cellular for Faster Internet Upload and Download Speeds

Why Combining Starlink with 4G/5G Cellular Is the Right Architecture for Most Businesses

Starlink and 4G/5G cellular are the two most widely available high-speed internet options for businesses operating outside the reach of fiber optic or wired Ethernet broadband. They also happen to be highly complementary.

Starlink provides consistent internet download speeds of 100 to 220 Mbps with low latency suitable for most business workloads, and it’s available in locations where no cellular tower exists. 4G/5G cellular provides low latency and fast handoffs that make it particularly good for real-time applications, and it’s unaffected by satellite weather events or dish obstructions.

Used separately, each has limitations. Starlink has no SLA and experiences periodic micro-outages. 4G/5G cellular has geographic coverage gaps and shared bandwidth that degrades during peak usage. Used together with Speedify, each connection covers the other’s weaknesses:

• When Starlink experiences satellite congestion, Speedify shifts more traffic to 4G/5G cellular automatically.
• When 4G/5G cellular signal quality degrades, Speedify shifts more traffic to Starlink automatically.
• When both are healthy, Speedify uses both simultaneously for faster upload and download speeds than either provides alone.

How Speedify Combines Starlink Internet and 4G/5G Cellular

Speedify’s channel bonding technology routes all internet traffic through a single encrypted Speedify tunnel. Inside that tunnel, Speedify splits packets across Starlink and 4G/5G cellular simultaneously based on real-time performance measurements like latency, packet loss, and jitter, taken on each connection every few milliseconds.

Because traffic moves at the packet level rather than the session level, a single video call, file upload, or VPN session uses bandwidth from both connections at the same time. Your team can get up to 95% of the combined upload and download capacity of Starlink and 4G/5G cellular in optimal conditions.

When either connection degrades or fails, Speedify moves affected packets to the healthy connection immediately. Active sessions don’t reset. VoIP calls continue. Video conferences stay connected. The switch is transparent to users and applications.

Network admins on Speedify Teams plans can set specific priorities for each internet connection, treating Starlink as primary and 4G/5G cellular as a metered standby, or running both equally weighted, and apply data limits to the cellular connection to control costs on metered plans.

Starlink and Cellular Configurations with Speedify

• Starlink primary, 4G/5G cellular standby. Speedify uses Starlink for all internet traffic under normal conditions and keeps 4G/5G cellular active as a monitored standby. When Starlink internet degrades or drops, all traffic moves to 4G/5G cellular automatically. When Starlink internet recovers, Speedify rebalances the combined connection. The cellular connection’s data usage is minimized because it only carries traffic when needed.
• Equal-weight bonding between Starlink internet and 4G/5G cellular. Speedify distributes internet traffic equally across Starlink and 4G/5G cellular simultaneously. Both connections contribute to upload and download throughput at all times. The right configuration when maximizing bandwidth is the priority and cellular data costs are not a constraint.
• Starlink plus multiple 4G/5G cellular carriers. For operations in locations with multiple carrier options, Speedify can bond Starlink internet with 4G/5G cellular connections from two or more carriers simultaneously. If one carrier’s coverage degrades, the others continue alongside Starlink.
• 4G/5G Cellular primary, Starlink backup. In urban and suburban areas where 4G/5G cellular provides lower latency and higher reliability than Starlink internet, Speedify can treat cellular as the default path and use Starlink as standby. Useful when cellular performance is strong but Starlink provides the coverage guarantee for edge cases.

How to Set Up Speedify to Combine Starlink and 4G/5G Cellular

Option 1: Speedify App on Each Device

• Connect your device to Starlink satellite internet via the Starlink Wi-Fi network or a wired Ethernet connection from the Starlink router.
• Connect your device to 4G/5G cellular — via a hotspot device, a USB cellular modem, or a Wi-Fi network from a cellular router.
• Install the Speedify app. Speedify runs on Windows, macOS, Linux, iOS, and Android.
• Speedify detects both connections automatically and begins combining them. Set connection priorities and data limits in the Speedify app or via the Speedify Teams dashboard.

Option 2: Speedify on a Router

• Connect your Starlink dish and 4G/5G cellular modem or router to a Speedify-compatible router running OpenWrt firmware. The Miri X510 bonding router powered by Speedify has built-in support for multiple WAN inputs including cellular modems.
• Speedify bonds Starlink internet and 4G/5G cellular at the router level. Every device on your business network benefits from the combined connections without per-device configuration.
• Manage connection priorities, data limits, and usage monitoring from the Speedify for Routers dashboard.

Which Businesses Need to Combine Starlink Internet with Cellular Using Speedify

• Remote offices and branch locations. Any business location without fiber optic or wired Ethernet broadband that needs both reliable internet and redundancy. Starlink and 4G/5G cellular bonded with Speedify covers both requirements without fixed-line infrastructure.
• Field teams and mobile operations. Workers operating in locations that move between cellular coverage areas and Starlink coverage zones benefit from Speedify automatically managing both connections and using whichever is performing better at any given moment.
• Businesses managing cellular data costs. Speedify Teams lets network admins set data caps on the 4G/5G cellular connection so it stays within a monthly data budget. Starlink carries the bulk of internet traffic. Cellular activates automatically when Starlink is insufficient, up to the configured data limit.
• Retail, hospitality, and event operations. Businesses running point-of-sale systems, payment terminals, or guest Wi-Fi at temporary or remote locations can use Starlink and cellular bonded with Speedify for reliable internet without depending on a single connection type.
• IoT and embedded systems deployments. Industrial IoT installations and embedded systems deployments in remote locations can use a Speedify-compatible router to bond Starlink and 4G/5G cellular at the network level, providing redundant connectivity for all connected devices without per-device software.

Speedify Is Used on Millions of Devices Worldwide

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Hundreds of terabytes of fast, secure data streamed every week via Speedify

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Speedify Plans for Combining Starlink Internet and 4G/5G Cellular

Speedify Teams gives network admins centralized management over Starlink and cellular combinations across an organization: connection priorities, data limits, usage monitoring, and team device management from a single dashboard.

For businesses requiring dedicated bandwidth, static IP addresses, and port forwarding, Speedify Dedicated Servers are available as a managed option. For businesses with data residency requirements, Speedify Self-Hosted Servers let your team route Speedify traffic through your own private server infrastructure.

The Speedify app runs on Windows, macOS, Linux, iOS, Android, and supported OpenWrt routers. For network-level Starlink and cellular bonding, the Miri X510 bonding router powered by Speedify is the purpose-built hardware option.

Speedify Business Solutions

Speedify Teams

Get faster uploads and downloads and a more reliable internet connection for all the people and devices in your business.

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Speedify for Routers

Power your OpenWRT, GL.iNET, or Miri router with Speedify and combine Wi-Fi, Ethernet, 4G, 5G, Starlink and other satellite internet connections together.

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Speedify Embedded Solutions and Integrations

Embed Speedify software into your app or hardware products and leverage the core channel bonding technology of Speedify in new and interesting ways.

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